The main sites from my last job load the mobile view/content first, then load in the desktop experience as appropriate (some are still in the process of transit

The main sites from my last job load the mobile view/content first, then load in the desktop experience as appropriate (some are still in the process of transitioning to the newer design). However they were done in such a way that it shouldn't result in any jarring transitions. A couple of examples: https://portal.ehawaii.gov/ https://portal.ehawaii.gov/ http://energy.hawaii.gov/ http://energy.hawaii.gov/